I don't use Facebook much however there were some private support groups on there related to my health issues. However many of my friends and family don't know

I don't use Facebook much however there were some private support groups on there related to my health issues. However many of my friends and family don't know about my health issues so I wanted to create a separate account to view those groups. In order that Facebook doesn't link to my older account, I created a new account on my laptop, created a new gmail account, then created a new Facebook account with fake information. Even then Facebook managed to link me to the friends and family with my original account.